Some people feel the urge to sneeze when exposed to bright sunlight. This happens often, especially while driving. It turns out that this is caused by a unique syndrome called ACHOO. In this respect reports TimesNewsUK.
ACHOO is an autosomal dominant, persistent helio-ophthalmic flare syndrome. It is seen in 17% of the world’s population. ACHOO syndrome has various names, including solar sneezing, photic sneeze reflex, and photonesia. Doctors from the private American Cleveland Clinic state that the reflex is mostly triggered when moving from a dark area to a bright area. Some people may sneeze when exposed to camera or phone flash.
Sneezing while looking at the sun may be caused by stimulation of the trigeminal nerve, which is located next to the optic nerves. The trigeminal nerve is responsible for the motor function of the face, as well as the processes of chewing and swallowing. When bright sunlight hits the pupil, it can indirectly cause secretion in the nasal mucosa, resulting in sneezing.
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